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OpenStudy (anonymous):
Jack usually mows his lawn in 4 hurs. Marilyn can mow the same yard in 6 hours. How much time would it take for them to mow the lawn together? They can mow the lawn in ____hours if they worked together.
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hero (hero):
Hint: \[\frac{J \times M}{J + M}\]
OpenStudy (anonymous):
2.4 hours
hero (hero):
Correct
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